Improvement



E. A. POND.

Pill Machine.

No. 9,455. Patented Dec. 7,1852.

UNITED STATES PATENT" OFFICE.

ERASMUS A. POND, or RUTLAND, VERMONT.

IMPROVEMENT m PILL-MAKING MACHINES.

Specification forming partpf Letters Patent No. 9,455, dated December 7185 To all whom it may concern:

Be it known that I, ERASMUS A. POND, of

Rutland, in. the county of Rutland and Stateof Vermont, have inventedcertain new and. useful Improvements in Machinery for Making Pills; andI do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l is aside elevation of one of my improved pill-making machines. Fig. 2 is avertical-section of the same. Fig. 3 exhibits one of themold-rollersdetached from the machine. Fig. 4 is a section'of the partsof the two mold-rollers which arein contact.

Similar letters of reference indicate corresponding 'parts in each'ot'the several figures. v This invention consists in the employment of twocylinders having a number of recesses in their peripheries, the saidrecesses beingv of hemispherical form or of theform of half the pills,and at corresponding distances apart 'in each. cylinder, and thecylinders being placed parallel with each other with their peripheriesnearlytouching, and being geared together in such a manner that therecesses in each match onregister with the recesses in the other, andthat they will revolve'in opposite directions. Thetpill mass is fed inbetween thecylinders by a pair'o'f feed-rolls, and, beingpressed intotherecesses, is formed into pills. In order to prevent the pillsremaining in the recesses and to insure their being disengaged from thecylinders, a small roller'is placed parallel with each cylinder, and anendless band of thin india-rubb'er or other elastic material ofsufficient width to cover all therecesses' passes round the cylinderandsmall roller. This band moves with the revolution of the cylinder,and is pressed into the recesses by the pill mass as it is formed intopills; but after the molds'pass each other and the pressure is removed,the band springs out of the molds and expels or delivers the pills.

To enable others skilled in the art to make and use my invention, I willproceed. to describe its construction and operation.

A is the frame of the machine.

B B are the mold-cylinders, whose journals 1) b are fitted to suitablebearings in the frame.

The two cylinders shown are just alike, each having the same numberofrecesses a a, similarly arranged. It is intended that the recesses shallbe as close as possible together, so as to have the greatest numberpossible in one pair-of cylinders. The toothed wheels 'L L, by which thecylinders are geared, have each the same number of teeth, so that theyrevolve at the same speed.

0 G are the feed-rolls, which are placed at ders faster than the feedrolls.

The elastic bands I I are .shown in Figs. 1

and 2, and also in Fig. 4, in red color, for the sake ofciearer'identilication. The rollers J J round which they pass have theiraxes fitted in suitable hearings in the framing. 'the mold-cylindersthere is an inclined trough "or' chute, K,.into which the pieces falland Under down which they are conducted intd any suitable receptacle.The pill mass is placed above the-feed-rollers and is drawn throughthem,

by which it is reduced to sheets of suitable thickness to make thepills, and pressed down to the mold-cylinders. By the revolution of thecylinders the matching-recesses are placed,

and as they come in contact each matching pair forms a perfect mold andform one pill.

Themanner in which the elastic band operates is shown in Fig. 2, whereit is shown at e pressed into the recesses a a, and entirely surroundingor incasing the pill. At f the mold is shown open, and the pill is justbe-. ing expelled from the recess. The recesses and band are shown inthe last place in dotted lines, as the mold there represented is not inline with the one above it. The molds are out of line circumferentiallyfor the purpose of using the whole width of the sheet or" p'ill mass.Fig. 4 shows a whole row of molds filled. What I claim as my invention,and desire to secure by Letters Patent, is-- The mold-cylinders andfeed-rollers are 1. Molding or forming pills by'means of. two cylinders,B B,'havi-ng. each a number of recesses, a w, in its periphery, therecesses in one cylinder matching with those in theother, and eachmatching pair forming a mold of the required form of the pilL-thesaid'cylinders revolving in opposite directions, and the pill mass beingconducted between them, substantially as herein described.

2; The bands I I, of indie-rubber or" any sufiiciently elastic material.passing round or partlyround the mold-cylinders, for the'purpose ofexpellingthe pills from the recesses a a after ifs he molds are open,substantially as herein set orth.

ER'AsMUs A. from).

Witnesses:

W. H. SMITH, L. B. PHILBRIOK.

